Improvement in window-sash locks



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Letters Patent No. 112,042, dated February 21, 1871.

IMPROVEMENT IN WINDOW-SASH LOCKS.

The Schedule referred to in these Letters Patent and making parl: of the same.

To all whom. it may concern.i

ticut, have invented a new and useful Improvement'V in Window-Sash Fasteners or Stoppers; and I do hereby declare that the following is a full, clear, vand exact description of the construction, character, and operation of the same, reference being had tothe accompanying drawing which makes part of this specification, in which- Figure I is a perspective view of the window-frame, stay-casing, and fastener.

Figure 2 is a section of the saine, cut horizontally through one of the knobs and its appendages.

Figure 3 is a perspectiveview oi' a section of the sash, showing one notch-or recessby which itis tohe fastened.

Figure 4 is a perspective View of the slide which fastens the sash at any desired elevation.

, Figure 5 is a perspective of one of the screw-bolts and knobs by which I adjust the stay-casing to the sash.

Figure 6 is a plan 6r form into which the inner end of the bolt passes and operates.

A`Similar letters of reference designate like parts.

I make the window-frame, as A, iigs. l and 2, in any of the usual ways calculated for weights, springs, or otherwise; but I tit on eacu side. two or more recessed slotted plates, as represented in tig. 6, through which the solid end ofthe screwbolt,iig. 5, passes, as indicated at a, flg. 2, so that the enlarged end or head of the bolt will pass through the enlarged or circular part of the opening, as at c, ltig. 6, and when closed up against the stile B of the lower sash, it will allow it to move up and down with freedom, yet without unreasonable looseness at any time.

I make the lower sash B in any of the usual ways, butin one or both of its stiles I make notches or re.- eesses, as shown at d, to receive a slide or fastener, as shown in tig. 4, and indicated at e, figs. l and 2.

These notches d in the stile may be multiplied to any desired extent, and may be made on'one or both sides.

I make the fastening or locking slide e, figs. 1, 2, and 4, substantially in the form shown in Iig. 4, or in any other convenient form, so that'it may fasten or lock the lower sash in any desired position.

I make the face-plate, shown in lig. 6, of cast-iron, or `any other suitable material, and bore out the wood, so as to form a suitable recessfor the head or enlarged part of the screw -knob, as indicated at a, tic. 2. Y

I make the screw-bolt g, figs. 1, 2, and 5, so that the head l) will pass through the plate, iig. 6, at c, and then under or behind it, so as to hold the stay-casing of the lower sash in ,the desired position to the sash at any time; and on the outer end of 'this screw-bolt I turn or screw a 'knob or nut, as shown at h, gs. 1, 2, and. 5.

Having made the several parts as before described, andtted the requisite number of recessed plates, as fig. 6, I tit into the lstay-casing of the lower sash two or more screwebolts, as shown at g, figs. 1, 2, and 5, with their-heads' b and knob h, as before described.

I am aware that plans have been before proposed and patented for allowing the adjustment desired, but they are open to objections which mine avoid.

When an adjustment is made according to my invention, no new surface is uncovered on the face of the piece C, but however great the movement, the knob h retains the same position relatively to the surface on which it rests, and the movement is all on the under or ccneealed'parts.

The within-described Vconstruction of Athe slotted plate a c, adapted to iit in tile window-frame, as shown, with a recess underneath for the lhead of the bolt to be adjusted backward and forward therein,'iu combination with-the boltb g and threaded knob It, as and for the purposes herein set forth.

BENNET HOTCHKISS.

Witnesses LYMAN L. Soulan, It. FITZGERALD. 

